(57) A spectroscopic apparatus includes: a spectroscopic module; a temperature detection
unit that detects a temperature of the spectroscopic module; and a module control
unit that controls the spectroscopic module, in which the spectroscopic module includes
an interference filter that has a pair of reflection films, and a gap changing unit
which changes a dimension of a gap between the pair of reflection films by application
of a voltage, and a capacity detection circuit that outputs a detection signal in
accordance with an electrostatic capacity between the pair of reflection films, and
in which the module control unit corrects a target value of the detection signal that
is output from the capacity detection circuit, based on a temperature characteristic
of the spectroscopic module and a detection temperature that is detected by the temperature
detection unit, and controls the voltage that is to be applied to the gap changing
unit, in such a manner that the detection signal that is output from the capacity
detection circuit is the corrected target value.
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